/*----------------------------------------------------------------------------/
/  FatFs - Generic FAT Filesystem module  R0.15                               /
/-----------------------------------------------------------------------------/
/
/ Copyright (C) 2022, ChaN, all right reserved.
/
/ FatFs module is an open source software. Redistribution and use of FatFs in
/ source and binary forms, with or without modification, are permitted provided
/ that the following condition is met:

/ 1. Redistributions of source code must retain the above copyright notice,
/    this condition and the following disclaimer.
/
/ This software is provided by the copyright holder and contributors "AS IS"
/ and any warranties related to this software are DISCLAIMED.
/ The copyright owner or contributors be NOT LIABLE for any damages caused
/ by use of this software.
/
/----------------------------------------------------------------------------*/

/**
 * FAT12 -- 最大文件32MB，<128MB，最大文件数量4077，簇数≤4085
 * FAT16 -- 最大文件4GB，2MB~4GB，最大文件数量65517，簇数4086~65525
 * FAT32 -- 最大文件4GB，32MB~2TB，最大文件数量268435437，簇数≥65526
 * 磁盘格式化时，FAT12/16/32由簇数决定
 * SD卡自带FTL(闪存转译层)，FatFs不支持掉电保护和擦写均衡
 */

#ifndef FF_DEFINED
#define FF_DEFINED	80286	/* Revision ID */

#ifdef __cplusplus
extern "C" {
#endif

#include "ffconf.h"		/* FatFs configuration options */

#if FF_DEFINED != FFCONF_DEF
#error Wrong configuration file (ffconf.h).
#endif


/* Integer types used for FatFs API */

#if defined(_WIN32)		/* Windows VC++ (for development only) */
#define FF_INTDEF 2
#include <windows.h>
typedef unsigned __int64 QWORD;
#include <float.h>
#define isnan(v) _isnan(v)
#define isinf(v) (!_finite(v))

#elif (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || defined(__cplusplus)	/* C99 or later */
#define FF_INTDEF 2
#include <stdint.h>
typedef unsigned int	UINT;	/* int must be 16-bit or 32-bit */
typedef unsigned char	BYTE;	/* char must be 8-bit */
typedef uint16_t		WORD;	/* 16-bit unsigned integer */
typedef uint32_t		DWORD;	/* 32-bit unsigned integer */
typedef uint64_t		QWORD;	/* 64-bit unsigned integer */
typedef WORD			WCHAR;	/* UTF-16 character type */

#else  	/* Earlier than C99 */
#define FF_INTDEF 1
typedef unsigned int	UINT;	/* int must be 16-bit or 32-bit */
typedef unsigned char	BYTE;	/* char must be 8-bit */
typedef unsigned short	WORD;	/* 16-bit unsigned integer */
typedef unsigned long	DWORD;	/* 32-bit unsigned integer */
typedef WORD			WCHAR;	/* UTF-16 character type */
#endif


/* Type of file size and LBA variables */

#if FF_FS_EXFAT
#if FF_INTDEF != 2
#error exFAT feature wants C99 or later
#endif
typedef QWORD FSIZE_t;
#if FF_LBA64
typedef QWORD LBA_t;
#else
typedef DWORD LBA_t;
#endif
#else
#if FF_LBA64
#error exFAT needs to be enabled when enable 64-bit LBA
#endif
typedef DWORD FSIZE_t;
typedef DWORD LBA_t;
#endif



/* Type of path name strings on FatFs API (TCHAR) */

#if FF_USE_LFN && FF_LFN_UNICODE == 1 	/* Unicode in UTF-16 encoding */
typedef WCHAR TCHAR;
#define _T(x) L ## x
#define _TEXT(x) L ## x
#elif FF_USE_LFN && FF_LFN_UNICODE == 2	/* Unicode in UTF-8 encoding */
typedef char TCHAR;
#define _T(x) u8 ## x
#define _TEXT(x) u8 ## x
#elif FF_USE_LFN && FF_LFN_UNICODE == 3	/* Unicode in UTF-32 encoding */
typedef DWORD TCHAR;
#define _T(x) U ## x
#define _TEXT(x) U ## x
#elif FF_USE_LFN && (FF_LFN_UNICODE < 0 || FF_LFN_UNICODE > 3)
#error Wrong FF_LFN_UNICODE setting
#else									/* ANSI/OEM code in SBCS/DBCS */
typedef char TCHAR;
#define _T(x) x
#define _TEXT(x) x
#endif



/* Definitions of volume management，卷管理，分区和卷名。VolToPart[]数组需要
   用户定义，有几个逻辑卷就需要定义几个元素，pd指明这个逻辑卷使用的物理端口，
   这个端口对应着disk_xx()函数中的值。pt表示逻辑分区的数量，当想f_mkfs()想要
   格式化为多个分区时，pt用于指定分区数量 */

#if FF_MULTI_PARTITION		/* Multiple partition configuration */
typedef struct {
	BYTE pd;	/* Physical drive number */
	BYTE pt;	/* Partition: 0:Auto detect, 1-4:Forced partition) */
} PARTITION;
extern PARTITION VolToPart[];	/* Volume - Partition mapping table */
#endif

#if FF_STR_VOLUME_ID
#ifndef FF_VOLUME_STRS
extern const char* VolumeStr[FF_VOLUMES];	/* User defied volume ID */
#endif
#endif



/* Filesystem object structure (FATFS) */

typedef struct {
	BYTE	fs_type;		/* Filesystem type (0:not mounted) */
	BYTE	pdrv;			/* Volume hosting physical drive */
	BYTE	ldrv;			/* Logical drive number (used only when FF_FS_REENTRANT，可重入) */
	BYTE	n_fats;			/* Number of FATs (1 or 2) */
	BYTE	wflag;			/* win[] status (b0:dirty) */
	BYTE	fsi_flag;		/* FSINFO status (b7:disabled, b0:dirty) */
	WORD	id;				/* Volume mount ID */
	WORD	n_rootdir;		/* Number of root directory entries (FAT12/16) */
	WORD	csize;			/* Cluster size [sectors] */
#if FF_MAX_SS != FF_MIN_SS
	WORD	ssize;			/* Sector size (512, 1024, 2048 or 4096) */
#endif
#if FF_USE_LFN
	WCHAR*	lfnbuf;			/* LFN working buffer，长文件名 */
#endif
#if FF_FS_EXFAT
	BYTE*	dirbuf;			/* Directory entry block scratchpad buffer for exFAT */
#endif
#if !FF_FS_READONLY
	DWORD	last_clst;		/* Last allocated cluster */
	DWORD	free_clst;		/* Number of free clusters */
#endif
#if FF_FS_RPATH
	DWORD	cdir;			/* Current directory start cluster (0:root) */
#if FF_FS_EXFAT
	DWORD	cdc_scl;		/* Containing directory start cluster (invalid when cdir is 0) */
	DWORD	cdc_size;		/* b31-b8:Size of containing directory, b7-b0: Chain status */
	DWORD	cdc_ofs;		/* Offset in the containing directory (invalid when cdir is 0) */
#endif
#endif
	DWORD	n_fatent;		/* Number of FAT entries (number of clusters + 2) */
	DWORD	fsize;			/* Number of sectors per FAT */
	LBA_t	volbase;		/* Volume base sector */
	LBA_t	fatbase;		/* FAT base sector */
	LBA_t	dirbase;		/* Root directory base sector (FAT12/16) or cluster (FAT32/exFAT) */
	LBA_t	database;		/* Data base sector */
#if FF_FS_EXFAT
	LBA_t	bitbase;		/* Allocation bitmap base sector */
#endif
	LBA_t	winsect;		/* Current sector appearing in the win[] */
	BYTE	win[FF_MAX_SS];	/* Disk access window for Directory, FAT (and file data at tiny cfg)，磁盘扇区缓存 */
} FATFS;



/* Object ID and allocation information (FFOBJID)，对象头 */

typedef struct {
	FATFS*	fs;				/* Pointer to the hosting volume of this object */
	WORD	id;				/* Hosting volume's mount ID */
	BYTE	attr;			/* Object attribute */
	BYTE	stat;			/* Object chain status (b1-0: =0:not contiguous, =2:contiguous, =3:fragmented in this session, b2:sub-directory stretched) */
	DWORD	sclust;			/* Object data start cluster (0:no cluster or root directory) */
	FSIZE_t	objsize;		/* Object size (valid when sclust != 0) */
#if FF_FS_EXFAT
	DWORD	n_cont;			/* Size of first fragment - 1 (valid when stat == 3)，碎片 */
	DWORD	n_frag;			/* Size of last fragment needs to be written to FAT (valid when not zero) */
	DWORD	c_scl;			/* Containing directory start cluster (valid when sclust != 0) */
	DWORD	c_size;			/* b31-b8:Size of containing directory, b7-b0: Chain status (valid when c_scl != 0) */
	DWORD	c_ofs;			/* Offset in the containing directory (valid when file object and sclust != 0) */
#endif
#if FF_FS_LOCK
	UINT	lockid;			/* File lock ID origin from 1 (index of file semaphore table Files[])，互斥信号量索引 */
#endif
} FFOBJID;



/* File object structure (FIL)，文件结构体 */

typedef struct {
	FFOBJID	obj;			/* Object identifier (must be the 1st member to detect invalid object pointer) */
	BYTE	flag;			/* File status flags */
	BYTE	err;			/* Abort flag (error code) */
	FSIZE_t	fptr;			/* File read/write pointer (Zeroed on file open) */
	DWORD	clust;			/* Current cluster of fpter (invalid when fptr is 0) */
	LBA_t	sect;			/* Sector number appearing in buf[] (0:invalid) */
#if !FF_FS_READONLY
	LBA_t	dir_sect;		/* Sector number containing the directory entry (not used at exFAT) */
	BYTE*	dir_ptr;		/* Pointer to the directory entry in the win[] (not used at exFAT) */
#endif
#if FF_USE_FASTSEEK
	DWORD*	cltbl;			/* Pointer to the cluster link map table (nulled on open, set by application) */
#endif
#if !FF_FS_TINY
	BYTE	buf[FF_MAX_SS];	/* File private data read/write window */
#endif
} FIL;



/* Directory object structure (DIR)，目录结构体 */

typedef struct {
	FFOBJID	obj;			/* Object identifier */
	DWORD	dptr;			/* Current read/write offset */
	DWORD	clust;			/* Current cluster */
	LBA_t	sect;			/* Current sector (0:Read operation has terminated) */
	BYTE*	dir;			/* Pointer to the directory item in the win[] */
	BYTE	fn[12];			/* SFN (in/out) {body[8],ext[3],status[1]}，8.3格式的文件名，名字8字符，后最3字符 */
#if FF_USE_LFN
	DWORD	blk_ofs;		/* Offset of current entry block being processed (0xFFFFFFFF:Invalid)，长文件名 */
#endif
#if FF_USE_FIND
	const TCHAR* pat;		/* Pointer to the name matching pattern */
#endif
} DIR;



/* File information structure (FILINFO)，文件信息结构体 */

typedef struct {
	FSIZE_t	fsize;			/* File size */
	WORD	fdate;			/* Modified date */
	WORD	ftime;			/* Modified time */
	BYTE	fattrib;		/* File attribute */
#if FF_USE_LFN
	TCHAR	altname[FF_SFN_BUF + 1];/* Alternative file name，备选名称，也即8.3格式的短文件名 */
	TCHAR	fname[FF_LFN_BUF + 1];	/* Primary file name，主要名称 */
#else
	TCHAR	fname[12 + 1];	/* File name，8.3格式的短文件名 */
#endif
} FILINFO;



/* Format parameter structure (MKFS_PARM)，格式化参数 */
/* FAT磁盘的格式：引导分区、保留分区、FAT表1、FAT表2、根目录分区、其他目录文件区
 *    引导分区：包含BIOS参数块，该参数块存储有关卷布局和文件系统结构的信息，以及加载Windows 的引导代码。
 *    保留扇区：在第一个FAT开始之前的扇区数量，包括引导扇区。
 *    FAT表1：原始FAT表（可以简单理解FAT表为目录表，记录数据存储的位置。）
 *    FAT表2：FAT表的备份（为了防止原始FAT表被破坏后可以恢复）
 *    根目录分区：描述根目录分区中的文件和文件夹。
 *    其他目录文件区：包含文件系统中文件和文件夹的数据。
 */

typedef struct {
	BYTE fmt;			/* Format option (FM_FAT, FM_FAT32, FM_EXFAT FM_ANY and FM_SFD) */
	BYTE n_fat;			/* Number of FATs，fat表的个数，1表示一个，2表示2个，其中1个为备份fat，其他值会被强制为1 */
	UINT align;			/* Data area alignment (sector)，数据区域的对齐，以扇区为单位，该值和磁盘擦除单元有关，一般磁盘的擦除单元是一个sector，则该值为1，该值的取值范围是0<align<0x8000，且为2的n次方，非法的值会被强制为1 */
	UINT n_root;		/* Number of root directory entries，根目录下允许有多少个一级子目录，每个子目录项占32字节，1<=n_root<=32768，且是(扇区大小/32)的整数倍，否者强制为512 */
	DWORD au_size;		/* Cluster size (byte)，簇大小，以字节为单位，文件系统的读写单元，由1个或多个物理扇区组成，扇区是磁盘最小的擦写单位。如果设置为0，则系统自动选择，卷小于512K个扇区(256MB)，au=8(4KB)，卷小于64M个扇区(32G),au=64(32KB)，卷大于64M个扇区(32G),au=256(128KB) */
} MKFS_PARM;



/* File function return code (FRESULT) */

typedef enum {
	FR_OK = 0,				/* (0) Succeeded */
	FR_DISK_ERR,			/* (1) A hard error occurred in the low level disk I/O layer */
	FR_INT_ERR,				/* (2) Assertion failed */
	FR_NOT_READY,			/* (3) The physical drive cannot work */
	FR_NO_FILE,				/* (4) Could not find the file */
	FR_NO_PATH,				/* (5) Could not find the path */
	FR_INVALID_NAME,		/* (6) The path name format is invalid */
	FR_DENIED,				/* (7) Access denied due to prohibited access or directory full */
	FR_EXIST,				/* (8) Access denied due to prohibited access，因为禁止访问，访问被拒绝 */
	FR_INVALID_OBJECT,		/* (9) The file/directory object is invalid */
	FR_WRITE_PROTECTED,		/* (10) The physical drive is write protected */
	FR_INVALID_DRIVE,		/* (11) The logical drive number is invalid */
	FR_NOT_ENABLED,			/* (12) The volume has no work area */
	FR_NO_FILESYSTEM,		/* (13) There is no valid FAT volume */
	FR_MKFS_ABORTED,		/* (14) The f_mkfs() aborted due to any problem */
	FR_TIMEOUT,				/* (15) Could not get a grant to access the volume within defined period */
	FR_LOCKED,				/* (16) The operation is rejected according to the file sharing policyi，因文件共享策略操作被拒绝 */
	FR_NOT_ENOUGH_CORE,		/* (17) LFN working buffer could not be allocated */
	FR_TOO_MANY_OPEN_FILES,	/* (18) Number of open files > FF_FS_LOCK */
	FR_INVALID_PARAMETER	/* (19) Given parameter is invalid */
} FRESULT;




/*--------------------------------------------------------------*/
/* FatFs Module Application Interface                           */
/*--------------------------------------------------------------*/

/**
 * 打开模式
 *    FA_READ ----------- 要读取必须带此参数
 *    FA_WRITE ---------- 要写入必须带此参数
 *    FA_OPEN_EXISTING -- 存在则打开，不存在则报错
 *    FA_CREATE_NEW ----- 创建新文件，存在则报错
 *    FA_CREATE_ALWAYS -- 创建新文件，存在则截断为0
 *    FA_OPEN_ALWAYS ---- 存在则打开，不存在则创建
 *    FA_OPEN_APPEND ---- 存在则打开，不存在则创建，文件指针指向文件尾
 */
FRESULT f_open (FIL* fp, const TCHAR* path, BYTE mode);				/* Open or create a file */
FRESULT f_close (FIL* fp);											/* Close an open file object */
FRESULT f_read (FIL* fp, void* buff, UINT btr, UINT* br);			/* Read data from the file */
FRESULT f_write (FIL* fp, const void* buff, UINT btw, UINT* bw);	/* Write data to the file */
FRESULT f_lseek (FIL* fp, FSIZE_t ofs);								/* Move file pointer of the file object，lseek也具备将文件增大的功能，新增部分的数据未定义，POSIX中新增部分为全0，此处不兼容POSIX */
FRESULT f_truncate (FIL* fp);										/* Truncate the file，截断，将文件后面的内容全部删除 */
FRESULT f_sync (FIL* fp);											/* Flush cached data of the writing file */
FRESULT f_opendir (DIR* dp, const TCHAR* path);						/* Open a directory */
FRESULT f_closedir (DIR* dp);										/* Close an open directory */
FRESULT f_readdir (DIR* dp, FILINFO* fno);							/* Read a directory item */
FRESULT f_findfirst (DIR* dp, FILINFO* fno, const TCHAR* path, const TCHAR* pattern);	/* Find first file */
FRESULT f_findnext (DIR* dp, FILINFO* fno);							/* Find next file */
FRESULT f_mkdir (const TCHAR* path);								/* Create a sub directory */
FRESULT f_unlink (const TCHAR* path);								/* Delete an existing file or directory */
FRESULT f_rename (const TCHAR* path_old, const TCHAR* path_new);	/* Rename/Move a file or directory */
FRESULT f_stat (const TCHAR* path, FILINFO* fno);					/* Get file status */
FRESULT f_chmod (const TCHAR* path, BYTE attr, BYTE mask);			/* Change attribute of a file/dir */
FRESULT f_utime (const TCHAR* path, const FILINFO* fno);			/* Change timestamp of a file/dir */
FRESULT f_chdir (const TCHAR* path);								/* Change current directory */
FRESULT f_chdrive (const TCHAR* path);								/* Change current drive，切换磁盘，不能通过切换目录的方式切换到不同磁盘 */
FRESULT f_getcwd (TCHAR* buff, UINT len);							/* Get current directory */
FRESULT f_getfree (const TCHAR* path, DWORD* nclst, FATFS** fatfs);	/* Get number of free clusters on the drive，获取剩余空间 */
FRESULT f_getlabel (const TCHAR* path, TCHAR* label, DWORD* vsn);	/* Get volume label */
FRESULT f_setlabel (const TCHAR* label);							/* Set volume label，设置卷名，windows上显示的磁盘名称 */
/**
 * 从文件中读取数据并将数据转发到输出流，而不使用数据缓冲区，适用于小存储系统
 */
FRESULT f_forward (FIL* fp, UINT(*func)(const BYTE*,UINT), UINT btf, UINT* bf);	/* Forward data to the stream */
/**
 * opt为0时该函数会在磁盘上查找一块连续的空间，之后可以多次进行f_expand(opt=1)
 * 操作，这样可以创建多个连续的文件，这几个文件都是在opt为0时查到的空间里。
 * opt为1时，在磁盘上查找一个fsz大小的连续空间，创建一个新文件，新文件的内容
 * 是随机值，关闭文件后可以绕开文件系统，使用底层驱动直接读写该文件，虽然不
 * 推荐这样做。另外当文件的扇区连续时，数据的访问也要更快一些，需注意，
 * f_expand只能创建新文件或扩展文件大小为0的文件，该文件使用f_write写入后可
 * 能就不连续了，文件体积减小或不变时，FatFs本身不会更换簇的位置，仍然是连续
 * 的，不知道其他Fat系统是否也是这样，理论上这样做可以减少Fat表的修改次数，
 * 但就是不支持擦写均衡了，SD内部自带擦写均衡，也不需要上层做管理，其他裸存
 * 储，比如SPI Flash则需要在diskio.c层做擦写均衡。官方文档中提供了检测文件
 * 扇区是否连续的方法。
 */
FRESULT f_expand (FIL* fp, FSIZE_t fsz, BYTE opt);					/* Allocate a contiguous block to the file */
/**
 * fs: 外部定义的FATFS结构体全局变量，f_mount会将它的地址保存到FatFs[]变量中，
 *     当fs为NULL时，表示卸载该磁盘
 * path: 磁盘路径，类似于"0:"
 * opt: 0表示暂不挂载，仅仅是将fs和FatFs[]进行初始化，不涉及SD卡的读写操作，
 *      等之后有文件操作时才会执行挂载流程，1表示立即挂载
 */
FRESULT f_mount (FATFS* fs, const TCHAR* path, BYTE opt);			/* Mount/Unmount a logical drive */
/**
 * path: 逻辑磁盘的编号，比如"0:"
 * opt: 可以为NULL，则会使用缺省值，所有的参数均为自动设定
 * work: 格式化需要的缓冲区，如果为null，则内部调用malloc(len)进行申请
 * len: 缓冲区的大小，应当是物理扇区的整数倍，比如512、1024字节
 * f_mkfs仅会操作FAT的RSV、FAT、DIR区，DATA区不做操作
 */
FRESULT f_mkfs (const TCHAR* path, const MKFS_PARM* opt, void* work, UINT len);	/* Create a FAT volume */
FRESULT f_fdisk (BYTE pdrv, const LBA_t ptbl[], void* work);		/* Divide a physical drive into some partitions */
FRESULT f_setcp (WORD cp);											/* Set current code page */
int f_putc (TCHAR c, FIL* fp);										/* Put a character to the file */
int f_puts (const TCHAR* str, FIL* cp);								/* Put a string to the file */
int f_printf (FIL* fp, const TCHAR* str, ...);						/* Put a formatted string to the file */
TCHAR* f_gets (TCHAR* buff, int len, FIL* fp);						/* Get a string from the file */

/* Some API fucntions are implemented as macro */

#define f_eof(fp) ((int)((fp)->fptr == (fp)->obj.objsize))
#define f_error(fp) ((fp)->err)
#define f_tell(fp) ((fp)->fptr)
#define f_size(fp) ((fp)->obj.objsize)
#define f_rewind(fp) f_lseek((fp), 0)
#define f_rewinddir(dp) f_readdir((dp), 0)
#define f_rmdir(path) f_unlink(path)
#define f_unmount(path) f_mount(0, path, 0)




/*--------------------------------------------------------------*/
/* Additional Functions                                         */
/*--------------------------------------------------------------*/

/* RTC function (provided by user) */
#if !FF_FS_READONLY && !FF_FS_NORTC
DWORD get_fattime (void);	/* Get current time */
#endif


/* LFN support functions (defined in ffunicode.c) */

#if FF_USE_LFN >= 1
WCHAR ff_oem2uni (WCHAR oem, WORD cp);	/* OEM code to Unicode conversion */
WCHAR ff_uni2oem (DWORD uni, WORD cp);	/* Unicode to OEM code conversion */
DWORD ff_wtoupper (DWORD uni);			/* Unicode upper-case conversion */
#endif


/* O/S dependent functions (samples available in ffsystem.c) */

#if FF_USE_LFN == 3		/* Dynamic memory allocation，如果长文件名需要放在堆上的话，则需要实现内存管理函数 */
void* ff_memalloc (UINT msize);		/* Allocate memory block */
void ff_memfree (void* mblock);		/* Free memory block */
#endif
#if FF_FS_REENTRANT	/* Sync functions，为支持函数可重入，需要一些同步函数 */
int ff_mutex_create (int vol);		/* Create a sync object */
void ff_mutex_delete (int vol);		/* Delete a sync object */
int ff_mutex_take (int vol);		/* Lock sync object */
void ff_mutex_give (int vol);		/* Unlock sync object */
#endif




/*--------------------------------------------------------------*/
/* Flags and Offset Address                                     */
/*--------------------------------------------------------------*/

/* File access mode and open method flags (3rd argument of f_open) */
#define	FA_READ				0x01 // 要读取必须带此参数
#define	FA_WRITE			0x02 // 要写入必须带此参数
#define	FA_OPEN_EXISTING	0x00 // 存在则打开，不存在则报错
#define	FA_CREATE_NEW		0x04 // 创建新文件，存在则报错
#define	FA_CREATE_ALWAYS	0x08 // 创建新文件，存在则截断为0
#define	FA_OPEN_ALWAYS		0x10 // 存在则打开，不存在则创建
#define	FA_OPEN_APPEND		0x30 // 存在则打开，不存在则创建，文件指针指向文件尾

/* Fast seek controls (2nd argument of f_lseek) */
#define CREATE_LINKMAP	((FSIZE_t)0 - 1)

/* Format options (2nd argument of f_mkfs)，这四个参数是向下兼容的，也即选择
   FM_FAT系统会根据情况格式化为FAT16/12，选着FM_FAT32时，如果磁盘满足要求则会
   格式化为FAT32否者会格式化为FAT16/12 */
#define FM_FAT		0x01
#define FM_FAT32	0x02
#define FM_EXFAT	0x04
#define FM_ANY		0x07  /* 根据磁盘容量和类型自动选择，相当于(FM_FAT|FM_FAT32|FM_EXFAT) */
#define FM_SFD		0x08  /* 格式化为超级软盘格式，设置时，保留区仅为1个扇区即DBR，若不设置则保留区会占用64个扇区，包含DBR和分区表等 */

/* Filesystem type (FATFS.fs_type) */
#define FS_FAT12	1
#define FS_FAT16	2
#define FS_FAT32	3
#define FS_EXFAT	4

/* File attribute bits for directory entry (FILINFO.fattrib) */
#define	AM_RDO	0x01	/* Read only */
#define	AM_HID	0x02	/* Hidden */
#define	AM_SYS	0x04	/* System */
#define AM_DIR	0x10	/* Directory */
#define AM_ARC	0x20	/* Archive */


#ifdef __cplusplus
}
#endif

#endif /* FF_DEFINED */
